Henry Platt, former president of Tiffany & Co., described tanzanite's discovery in 1967 as THE most important gemstone find in 2000 years! This single 5-mile strip of land in Tanzania remains the only commercially viable source of this stone that has become one of the world's most sought-after and admired gems. Tanzanite is a relatively new gemstone in the world of gemology and jewelry, and though its history is brief, it is no less illustrious than many ancient gems. Tanzanite is a single-source gemstone that is a thousand times rarer than diamond, and is only gaining popularity.